{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-v9pnmzbe","versions":[{"created_at":"2026-06-10T23:00:23Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20835511 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5018bd24e0f6cdcb1777e25dac935fedea9088254b79021480a111d265d3ca50","version":9},{"created_at":"2026-06-10T21:11:43Z","element_count":91,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"103b8dcb334162bcac3f60079a953488326c1e709a003fc33bb7b4b645a9a910","version":3}]}